Citation Rankings
Highly Cited Researchers
AfricaAgriculture & Forestry / Fisheries Highly Cited Researchers 810 Scientists Citation Rankings - 2025
Discover the world’s highly cited researchers through the AD Scientific Index 2025 Citation Rankings.
These rankings evaluate scientists based on their total and recent citation counts, capturing the breadth and real-time currency of academic recognition. Citation data reveals how widely a scholar’s work is referenced, applied, and extended across diverse disciplines. The rankings are routinely updated to reflect ongoing citation growth, while eliminating distortions from excessive co-authorship and institutional inflation. Premium tools provide access to detailed citation dynamics, unethical citation behavior detection, and field-normalized benchmarking.
* Total Citation Counts Rankings
Ranking Based On Selection: 1
Aquaculture and Fisheries
Animal Science
Environmental Science
WEF Nexus
Sustainabilit
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
21,250
19,871
0.935
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* Total Citation Counts Rankings
Ranking Based On Selection: 2
Marine ecolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,589
4,862
0.312
* Total Citation Counts Rankings
Ranking Based On Selection: 3
fisheries
marine
Benguela
indicators
ecosyste
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,546
5,028
0.346
* Total Citation Counts Rankings
Ranking Based On Selection: 4
Marine invertebrate biodiversity
marine alien specie
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,637
3,353
0.265
* Total Citation Counts Rankings
Ranking Based On Selection: 5
Inland Fisheries
Fish Biology
Freshwater Ecology
Invasion Ecolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,190
6,490
0.637
* Total Citation Counts Rankings
Ranking Based On Selection: 6
Marine Mammal Ecolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,189
3,301
0.324
* Total Citation Counts Rankings
Ranking Based On Selection: 7
Aquaculture
fish biology
fisherie
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,406
4,239
0.451
* Total Citation Counts Rankings
Ranking Based On Selection: 8
fisheries
ocean governanc
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,501
3,317
0.442
* Total Citation Counts Rankings
Ranking Based On Selection: 9
Marine full-spectrum sustainability
Structured decision making
Climate chang
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,160
1,933
0.270
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* Total Citation Counts Rankings
Ranking Based On Selection: 10
Marine Ecolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,491
2,150
0.331
* Total Citation Counts Rankings
Ranking Based On Selection: 11
Fisheries
Mariculture
Women empowerment
Marine mammals
Climate chang
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,005
3,118
0.519
* Total Citation Counts Rankings
Ranking Based On Selection: 12
Ecosystem health
One Health
Ecosystem healt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,680
3,525
0.621
* Total Citation Counts Rankings
Ranking Based On Selection: 13
Marine Biology and Coastal Oceanograph
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,239
2,489
0.475
* Total Citation Counts Rankings
Ranking Based On Selection: 14
marine natural product
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,739
1,346
0.284
* Total Citation Counts Rankings
Ranking Based On Selection: 15
Aquaculture
Fisheries
Marine Biolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,653
2,083
0.448
* Total Citation Counts Rankings
Ranking Based On Selection: 16
Food biotechnology
Food Safety
Natural Product
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,540
2,958
0.652
* Total Citation Counts Rankings
Ranking Based On Selection: 17
Ichthyology
ecolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,479
1,369
0.306
* Total Citation Counts Rankings
Ranking Based On Selection: 18
Fish Biology
Environmental Pollution
Aquatic Toxicology
Bioradiatio
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,440
3,439
0.775
* Total Citation Counts Rankings
Ranking Based On Selection: 19
Marine ecology
Fisheries biolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,266
1,150
0.270
* Total Citation Counts Rankings
Ranking Based On Selection: 20
Marine ecology
invasion biolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,215
2,500
0.593
* Total Citation Counts Rankings
Ranking Based On Selection: 21
Aquaculture
Nutritional biochemistry
Modelling
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,210
3,202
0.761
* Total Citation Counts Rankings
Ranking Based On Selection: 22
marine pelagic ecology
climate change adaptatio
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,128
3,426
0.830
* Total Citation Counts Rankings
Ranking Based On Selection: 23
Corals/Coral reefs
coral bleaching
adaptation to climate change and sustainable developmen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,054
1,780
0.439
* Total Citation Counts Rankings
Ranking Based On Selection: 24
coastal erosion
shoreline change modelling
coastal processe
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,784
2,705
0.715
* Total Citation Counts Rankings
Ranking Based On Selection: 25
cephalopods
all aspects
fish and fisherie
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,682
1,015
0.276
* Total Citation Counts Rankings
Rankings
40,011
50
2
Ranking Based On Selection: 1
Mahmoud Dawood
Kafr El Sheikh University
Kafr el-Sheikh, Egypt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
21,250
19,871
0.935
Aquaculture and Fisheries
Animal Science
Environmental Science
WEF Nexus
Sustainabilit
* Total Citation Counts Rankings
Rankings
60,998
206
4
Ranking Based On Selection: 2
Christopher Mcquaid
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,589
4,862
0.312
* Total Citation Counts Rankings
Rankings
66,749
227
48
Ranking Based On Selection: 3
Lynne Shannon
University of Cape Town
Cape Town, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,546
5,028
0.346
fisheries
marine
Benguela
indicators
ecosyste
* Total Citation Counts Rankings
Rankings
79,573
266
55
Ranking Based On Selection: 4
Charles Griffiths
University of Cape Town
Cape Town, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,637
3,353
0.265
Marine invertebrate biodiversity
marine alien specie
* Total Citation Counts Rankings
Rankings
102,884
363
2
Ranking Based On Selection: 5
Olaf LF Weyl
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,190
6,490
0.637
Inland Fisheries
Fish Biology
Freshwater Ecology
Invasion Ecolog
* Total Citation Counts Rankings
Rankings
102,900
364
27
Ranking Based On Selection: 6
Marthan Bester
University of Pretoria
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,189
3,301
0.324
* Total Citation Counts Rankings
Rankings
112,706
169
13
Ranking Based On Selection: 7
Abdel Fattah M El Sayed
Alexandria University
Alexandria, Egypt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,406
4,239
0.451
Aquaculture
fish biology
fisherie
* Total Citation Counts Rankings
Rankings
144,749
575
11
Ranking Based On Selection: 8
Warwick Sauer
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,501
3,317
0.442
* Total Citation Counts Rankings
Rankings
152,007
596
141
Ranking Based On Selection: 9
Astrid Jarre
University of Cape Town
Cape Town, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,160
1,933
0.270
Marine full-spectrum sustainability
Structured decision making
Climate chang
* Total Citation Counts Rankings
Rankings
168,368
666
21
Ranking Based On Selection: 10
Mark Gibbons
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,491
2,150
0.331
Smart Institutional Plan
Powerful Insights + Smart Membership = Institutional Success
Unlock 360° Real-Time Institutional Analysis to identify your institution’s strengths and areas for improvement.
* Total Citation Counts Rankings
Rankings
181,981
25
5
Ranking Based On Selection: 11
Jiddawi Narriman Saleh
University of Dar Es Salaam
Dar es Salaam, Tanzania
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,005
3,118
0.519
Fisheries
Mariculture
Women empowerment
Marine mammals
Climate chang
* Total Citation Counts Rankings
Rankings
192,245
26
3
Ranking Based On Selection: 12
Robinson H. Mdegela
Sokoine University of Agriculture
Morogoro, Tanzania
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,680
3,525
0.621
Ecosystem health
One Health
Ecosystem healt
* Total Citation Counts Rankings
Rankings
208,141
865
26
Ranking Based On Selection: 13
Albertus Smit
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,239
2,489
0.475
Marine Biology and Coastal Oceanograph
* Total Citation Counts Rankings
Rankings
229,106
956
30
Ranking Based On Selection: 14
Michael Davies-Coleman
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,739
1,346
0.284
* Total Citation Counts Rankings
Rankings
233,000
36
6
Ranking Based On Selection: 15
Yunus D. Mgaya
University of Dar Es Salaam
Dar es Salaam, Tanzania
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,653
2,083
0.448
Aquaculture
Fisheries
Marine Biolog
* Total Citation Counts Rankings
Rankings
238,219
517
14
Ranking Based On Selection: 16
Ahmed A Tayel
Kafr El Sheikh University
Kafr el-Sheikh, Egypt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,540
2,958
0.652
Food biotechnology
Food Safety
Natural Product
* Total Citation Counts Rankings
Rankings
241,361
1,008
20
Ranking Based On Selection: 17
Anthony Booth
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,479
1,369
0.306
* Total Citation Counts Rankings
Rankings
243,233
529
34
Ranking Based On Selection: 18
Alaa El Din H Sayed
Assiut University
Asyut, Egypt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,440
3,439
0.775
Fish Biology
Environmental Pollution
Aquatic Toxicology
Bioradiatio
* Total Citation Counts Rankings
Rankings
252,583
1,071
238
Ranking Based On Selection: 19
Colin Graham Attwood
University of Cape Town
Cape Town, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,266
1,150
0.270
* Total Citation Counts Rankings
Rankings
255,352
1,086
136
Ranking Based On Selection: 20
Tammy Robinson
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,215
2,500
0.593
* Total Citation Counts Rankings
Rankings
255,629
581
74
Ranking Based On Selection: 21
Ehab El Haroun
Cairo University
Giza, Egypt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,210
3,202
0.761
Aquaculture
Nutritional biochemistry
Modelling
* Total Citation Counts Rankings
Rankings
260,348
1,110
97
Ranking Based On Selection: 22
Sean O'donoghue
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,128
3,426
0.830
marine pelagic ecology
climate change adaptatio
* Total Citation Counts Rankings
Rankings
264,582
8
8
Ranking Based On Selection: 23
Ranjeet Bhagooli
University of Mauritius
Réduit, Mauritius
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,054
1,780
0.439
Corals/Coral reefs
coral bleaching
adaptation to climate change and sustainable developmen
* Total Citation Counts Rankings
Rankings
280,889
122
49
Ranking Based On Selection: 24
Appeaning Addo Kwasi
University of Ghana
Legon, Ghana
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,784
2,705
0.715
coastal erosion
shoreline change modelling
coastal processe
* Total Citation Counts Rankings
Rankings
287,688
1,250
26
Ranking Based On Selection: 25
Marek Lipinski
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,682
1,015
0.276
cephalopods
all aspects
fish and fisherie